Is CVE-2026-106559 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-106559 being exploited in the wild.

How severe is CVE-2026-106559?

Medium severity, with a CVSS score of 6.3, published 7 October 2026.

Which products and versions are affected?

Backstage Plugin-Scaffolder-Backend-Module-Confluence-To-Markdown < 0.3.25; @backstage/plugin-scaffolder-backend-module-confluence-to-markdown (npm) < 0.3.25, SEMVER:introduced=0,fixed=0.3.25.

How is CVE-2026-106559 attacked?

It is attacked over the network.

Am I affected by CVE-2026-106559?

Check whether you run Backstage Plugin-Scaffolder-Backend-Module-Confluence-To-Markdown, Linuxfoundation Backstage\, Linuxfoundation Plugin-Scaffolder-Backend-Module-Confluence-To-Markdown or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-106559: Backstage Confluence to Markdown scaffolder input validation bypass

Q: Is there a fix for CVE-2026-106559?

Yes. @backstage/plugin-scaffolder-backend-module-confluence-to-markdown (npm): upgrade to 0.3.25 or later. Until then: Restrict Confluence edit access to trusted users only. Review Confluence page content before running scaffolder templates against untrusted pages. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Q: How is CVE-2026-106559 attacked?

It is attacked over the network.

Q: Am I affected by CVE-2026-106559?

Check whether you run Backstage Plugin-Scaffolder-Backend-Module-Confluence-To-Markdown, Linuxfoundation Backstage\, Linuxfoundation Plugin-Scaffolder-Backend-Module-Confluence-To-Markdown or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-106559 · Severity: medium · CVSS 6.3 · Published 2026-10-07

Backstage is a framework for building developer portals; its Confluence to Markdown scaffolder module processes content from Confluence pages to generate files. Insufficient input validation allows an attacker who can edit Confluence pages to manipulate file writes on the Backstage instance when a user runs a template that processes that content, potentially overwriting or creating arbitrary files.

Technologies: Linuxfoundation Backstage\. Vendors: Backstage, Linuxfoundation, npm.

Quick answers

Is CVE-2026-106559 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-106559 being exploited in the wild.
How severe is CVE-2026-106559?: Medium severity, with a CVSS score of 6.3, published 7 October 2026.
Which products and versions are affected?: Backstage Plugin-Scaffolder-Backend-Module-Confluence-To-Markdown < 0.3.25; @backstage/plugin-scaffolder-backend-module-confluence-to-markdown (npm) < 0.3.25, SEMVER:introduced=0,fixed=0.3.25.
Is there a fix for CVE-2026-106559?: Yes. @backstage/plugin-scaffolder-backend-module-confluence-to-markdown (npm): upgrade to 0.3.25 or later. Until then: Restrict Confluence edit access to trusted users only. Review Confluence page content before running scaffolder templates against untrusted pages. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-106559 attacked?: It is attacked over the network.
Am I affected by CVE-2026-106559?: Check whether you run Backstage Plugin-Scaffolder-Backend-Module-Confluence-To-Markdown, Linuxfoundation Backstage\, Linuxfoundation Plugin-Scaffolder-Backend-Module-Confluence-To-Markdown or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

@backstage/plugin-scaffolder-backend-module-confluence-to-markdown (npm): upgrade to 0.3.25 or later
```
npm install @backstage/plugin-scaffolder-backend-module-confluence-to-markdown@0.3.25
```

Restrict Confluence edit access to trusted users only. Review Confluence page content before running scaffolder templates against untrusted pages.

Technical details

The vulnerability is a path traversal / external control of file name flaw (CWE-22, CWE-73) in the Confluence to Markdown scaffolder backend module. An attacker can craft malicious Confluence page content that causes file write operations to target paths outside the intended directory when a Backstage user executes a template. Attack requires network access and low privileges (Confluence edit access), plus user interaction (template execution), and impacts file integrity and availability.

Affected products

Backstage plugin-scaffolder-backend-module-confluence-to-markdown < 0.3.25

Identifiers

CVE-2026-106559
GHSA-75qf-886x-5xf2

Timeline

2026-08-28: disclosed
2026-10-07: advisory

References

https://github.com/backstage/backstage/security/advisories/GHSA-75qf-886x-5xf2

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